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Finding the Fourth Proportional to 516,235.20, 774,352.80 and 404,260.80

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Solution

The fourth proportional to 516,235.20, 774,352.80 and 404,260.80 is: 606,391.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,235.20 : 774,352.80 = 404,260.80 : x
  2. Step 2: Convert to fraction form
    516,235.20/774,352.80 = 404,260.80/x
  3. Step 3: Cross multiply
    516,235.20x = 774,352.80 × 404,260.80
  4. Step 4: Simplify right side
    516,235.20x = 313,040,482,410.24
  5. Step 5: Solve for x
    x = 313,040,482,410.24/516,235.20
  6. Step 6: Final answer
    x = 606,391.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.